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<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script>

	function outputNumber(count){
		//在for循环外部插入一个私有作用域：即是这个匿名函数
		(function(){
			
			for(var i=0;i<count;i++){
				console.log(i);//0 1 2 3 4
			};	
			console.log(i);//5
		})();
		console.log(i)// i is not defined在匿名函数中定义的任何变量，都会在执行结束时被销毁
	};
	
	outputNumber(5);
</script>
</head>

<body>
</body>
</html>
